Charging Curve - CTEK I2440 Manual

CHARGING CURVE

SOFT START
Max 3.0A
until 23.2V
Time limit: Max 4h
STEP 1 SOFT START
Tests if the battery can accept charge. This step prevents that charging proceeds with a defect
battery.
STEP 2 DESULPHATION
Detects sulphated batteries. Pulsing current and voltage, removes sulphate from the lead plates
of the battery restoring the battery capacity.
STEP 3 BULK
Charging with maximum current until approximately 80% battery capacity.
STEP 4 ABSORPTION
Charging with declining current to maximize up to 100% battery capacity.
6 • EN
DESULPHATION BULK
Max current 28.0V Max current
100 ms pulses until 28.8V
1 sec Max 20h
ABSORPTION FLOAT
Declining current
Max current 27.2V
28.8V
10days
Restart from Bulk if
Max 16h
voltage drops below
25.2V
STEP 5 FLOAT
Maintaining the battery voltage at maximum level by providing a constant voltage charge.
STEP 6 PULSE
Maintaining the battery at 95–100% capacity. The charger monitors the battery voltage and
gives a pulse when necessary to keep the battery fully charged.
The I2420/I2440 charger can be customized with other algorithms using the Service Tool
accessory (not included).
PULSE
Max current
25.6V–28.0V
Restart from Bulk if
voltage drops below
25.2V